To prevent cave-ins, sloped or tiered walls may be used for trenches less than _____.

a. 10' deep
b. 15' deep
c. 20' deep
d. 25' deep


Answer: C

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B) 1.5:1
C) 2:1
D) Cannot calculate

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____________________ tools regularly is a good way to keep them working safely and effectively

Fill in the blank(s) with correct word

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Answer the following statement true (T) or false (F)

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Indicate whether the statement is true or false

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